f = input()

if f == 'yukiko':
    ls = ['yukiko','oda']
else:
    ls = ['oda', 'yukiko']
    
a = []
for i in range(8):
    a.append(input())

cnt = 0
for i in a:
    cnt += i.count('.')
    
if cnt % 2 == 0:
    print(ls[0])
else:
    print(ls[1])